Massive ghost galaxy spotted hiding next to Milky Way

The worldwide research group found Ant 2 using data from the Gaia spacecraft, a European Space Agency satellite that's been compiling the most detailed and expansive catalog of stars in the Milky Way ever constructed.

The dwarf galaxy identified as Antlia 2 evaded scientists until now because it hides behind the Milky Way's galactic disk, but that's not the only reason scientists are fascinated by "Ant 2". However, it is not so small, reaching a diameter of one third of the milky Way, as a well known satellite of our Galaxy, the Large Magellanic Cloud (LMC).

Solving the Ant 2 puzzle may help researchers understand how the first structures in the early Universe emerged and finding more such objects will show just how common such ghostly galaxies are, the astronomers said.

There were various statements by the APS physics and one of them noted that these stars are supposed to be the remnants of the dwarf galaxy which at some time was vanished from the Milky Way galaxy a billion of years from now.

Ant 2 is also unusual because of how little light it gives out. In other words, it is either far too large for its luminosity or far too dim for its size.

The milky Way was another satellite galaxy, this time is unique: it is large but sparse and boring. In a paper presented at the online library of preprints arXiv.orgscientists describe 2 Antlia (Ant 2) as a small galaxy,"Ghost", unique among about 60 companions of the milky Way.

"RR Lyrae had been found in every known dwarf satellite [galaxy], so when we found a group of them sitting above the Galactic disc, we weren't totally surprised", said co-author Vasily Belokurov from Cambridge's Institute of Astronomy.

In April previous year, a team of astronomers found that stars in the vicinity of the Solar system are moving in the direction opposite to the direction of rotation of our galaxy, writes National Geographic.

Alternatively, the properties of the elusive "dark matter", thought to keep galaxies together, might need to be re-thought. But now it has been noted by the researchers that there would be about 10 billion of the solar masses from that particular dark matter which is coming from the real dwarf galaxy that is in the travel with the S1.

In March, a separate team of astronomers found the galaxy NGC 1052-DF2 that is missing most of its dark matter that challenges currently-accepted theories of galaxy formation and seeks scientists to re-look at the nature of planet formation as well as the studies on the dark matter.

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